1366 - Incorrect integer value: '' for column `abtecsho_shop`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'ag5ookuj2v4dnc3862tgu9d5h6', '216.73.216.80', '1766348339', '1766348339', '/advanced_search.php')

[XT SQL Error]